The TOPAZ512 chip is an NFC chip product of BROADCOM company. It has very good compatibility, long read and write distance, stable reading and writing. It belongs to NFC Forum Type 1 Tag, 7 bytes UID, 480 bytes capacity, and basically can realize all common NFC operations. However, the current reading and writing device does not support reading and writing at present, and if the number is small, it can be written by the NFC mobile phone.
This chip can package proximity cards, keychains, wristbands and sticker labels.